Select target framework (#163)

* Minor refactoring

* Introduce new setting for selecting target framework

* Use `IntPtr` where possible

* Fix path

* Throw if unsupported .NET

* ignore ffi files in C# examples

* Fix config file

* Add constructor for function pointer

* Use `IntPtr` in Bindgen.Runtime

.gitignore

@@ -23,6 +23,8 @@ lib/
 *.so
 
 # c2ffi artifacts
+src/cs/examples/**/ffi/
+src/cs/examples/**/ffi-x/
 src/c/tests/**/ffi/
 src/c/tests/**/ffi-x/
 

src/cs/C2CS.sln

@@ -10,7 +10,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "examples", "examples", "{56
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "helloworld", "helloworld", "{24028D61-CCE1-4893-9BD6-1D7C28563DC8}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "helloworld-compile-c-library-and-generate-bindings", "examples\helloworld\helloworld-compile-c-library-and-generate-bindings\helloworld-compile-c-library-and-generate-bindings.csproj", "{841E561C-B3BB-499B-AEB3-0874ACDDB2BC}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "helloworld-bindgen", "examples\helloworld\helloworld-bindgen\helloworld-bindgen.csproj", "{841E561C-B3BB-499B-AEB3-0874ACDDB2BC}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "C2CS.Tool", "production\C2CS.Tool\C2CS.Tool.csproj", "{1B67F4A2-24E6-43A6-A031-918DD44CD991}"
 EndProject

src/cs/examples/helloworld/helloworld-app/Generated/AssemblyAttributes.gen.cs

@@ -1,6 +1,6 @@
-// To disable generating this file set `isEnabledGenerateAssemblyAttributes` to `false` in the config file for generating C# code.
+
 // <auto-generated>
-//  This code was generated by the following tool on 2024-04-10 18:55:28 GMT-04:00:
+//  This code was generated by the following tool on 2024-05-07 16:36:40 GMT-04:00:
 //      https://github.com/bottlenoselabs/c2cs (v0.0.0.0)
 //
 //  Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
@@ -11,7 +11,7 @@
 #nullable enable
 #pragma warning disable CS1591
 #pragma warning disable CS8981
-using bottlenoselabs.C2CS.Runtime;
+using Bindgen.Runtime;
 using System;
 using System.Collections.Generic;
 using System.Globalization;
@@ -20,7 +20,11 @@
 #endregion
 
 #if NET7_0_OR_GREATER
+// NOTE: Disabling runtime marshalling is preferred for performance improvements. You can learn more here: https://learn.microsoft.com/en-us/dotnet/standard/native-interop/disabled-marshalling
 [assembly: DisableRuntimeMarshalling]
 #endif
 
+#if (NETCOREAPP1_0_OR_GREATER) || (NET45_OR_GREATER || NETFRAMEWORK && (NET45 || NET451 || NET452 || NET46 || NET461 || NET462 || NET47 || NET471 || NET472 || NET48)) || (NETSTANDARD1_1_OR_GREATER || NETSTANDARD && !NETSTANDARD1_0)
+// NOTE: Only takes effect on Windows. Specifies the recommended maximum number of directories (the application directory, the %WinDir%\System32 directory, and user directories in the DLL search path) to search for native libraries. You can learn more here at (1) https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.defaultdllimportsearchpathsattribute and (2) https://learn.microsoft.com/en-ca/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexa#parameters
 [assembly: DefaultDllImportSearchPathsAttribute(DllImportSearchPath.SafeDirectories)]
+#endif